man-with-men Posted January 8, 2012 Share Posted January 8, 2012 Hi Tried to sell my RB320 a couple of times due to using it as a work car. Now it's not and I need some help. Serious help please 3 straight through CAI K&N Remap Knocking about at 365/410 But I want more power and although I have asked some folks to suggest and price the next steps- they aren't moving fast enough. So, I know taking the 2.5 above 400bhp isn't wise, what should I do now? Forge it? What turbo? Anything else? I've got cash to burn so I wanna make this car quick and strong. It's an RB320 but I'm keeping it so it's time to mod more Gumball Link to comment
fai17 Posted January 8, 2012 Share Posted January 8, 2012 Hi Tried to sell my RB320 a couple of times due to using it as a work car. Now it's not and I need some help. Serious help please 3 straight through CAI K&N Remap Knocking about at 365/410 But I want more power and although I have asked some folks to suggest and price the next steps- they aren't moving fast enough. So, I know taking the 2.5 above 400bhp isn't wise, what should I do now? Forge it? What turbo? Anything else? I've got cash to burn so I wanna make this car quick and strong. It's an RB320 but I'm keeping it so it's time to mod more Gumball Forge it with pistons and rods. Drop a bolt on t or similar turbo. Bigger injector and fpr. Remap. Jobs a good one. Link to comment
scooby222 Posted January 8, 2012 Share Posted January 8, 2012 have you spoken to RA motorsport in perth? theyve built a few forged 2.5's now and can do pretty much everything in house, as Peter said you really need to strip it down and forge it, after that budget and taste dictates how big a turbo you want to run. apparently a forged 2.5 can run 550hp with a rotated turbo and still be quite civilised to drive Link to comment
fai17 Posted January 8, 2012 Share Posted January 8, 2012 A forge 2.5 with a good turbo will surprise you how quick it can be! Link to comment
man-with-men Posted January 9, 2012 Author Share Posted January 9, 2012 Thanks for the posts. Nice and simple. I'll speak to RA this week. I need to get the sizes and stuff so I can order the parts online and then get RA to build it. How long does the car need off the road for rods pistons injectors FPR and a new blower? Gumball Link to comment
colin_ross Posted January 9, 2012 Share Posted January 9, 2012 Wouldn't suggest a spec until I knew how much power you want. 2.5 seems to be good up to 400 as you say but if you're only wanting to go a smidge over then you should be fine. If you want much more then it's time to get out a pencil and a big bit of paper for the list of bits you'll need. Link to comment
jef Posted January 9, 2012 Share Posted January 9, 2012 forged pistons, acl bearings, decent head gaskets and my 2.5 ran 420/430 all day long fantastic car and never missed a beat Link to comment
ANDYJDMSTI Posted January 10, 2012 Share Posted January 10, 2012 Good brakes and suspension mods will make it fast! Link to comment
davey l wrx Posted January 10, 2012 Share Posted January 10, 2012 Twin Scroll turbo and will pull like a train with almost no lag... Pricey but makes the car more drivable. Link to comment
fai17 Posted January 10, 2012 Share Posted January 10, 2012 Colin has a fair point. I've seen so many 2.5 with problems that I will never go that route again but that depends in how much power you want Chris. Ultimate will be a 2.35 build Or the one that I will go for would be a forge 2.1 build. Greer's have one for sale which means it's ready to go and all the machining work has been done to the cdb. Bolt your heads on and new turbo and fmic and your off. Link to comment
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